Process of welding aluminium.



UNITED STATES PATENT OFFICE.

MARY W'ISZNIEWSKA EMME, OF NEW YORK, N. Y.

PROCESS OF WELDING ALUMINIUM.

SPECIFICATION forming part of Letters Patent No. 710,958, dated October14, 1902.

Application filed March 21, 1901. Serial No. 52,142. (No specimens.) I

To all whont it ntay concern.-

Be it known that I, MARY WIsZNIEWSKA EMMi'J, a citizen of the UnitedStates, residing at New York, in the county of New York and State of NewYork, have invented certain new and useful Improvements in Processes offolding Aluminium, of which the following is a full and completespecification, such as will enable those skilled in the art to which itappertains to make and use the same.

The object of my invention is to provide a simple and elfective processof welding aluminium or alloys of aluminium by means whereof a perfect,homogeneous, and permanent junction of the two ends of the metal may beaccomplished.

I have discovered that by heating two contacting ends of aluminium undersuitable conditions approximately to or above the temperature of 600centigrade welding can be effected.

The invention consists in bringing the two or more pieces ofthoroughly-cleansed metal or the two ends of the rods or wires of themetal into contact and applying a su fficiently high degree of heat toraise the parts to be united to the welding-point, whereupon they may bewelded together. To carry out my The degree of heat required isapproximately 600 centigrade and may vary, frequently requiring a slightexcess. The correct temperature is reached when the aluminium commencesto soften. By applying this heat when the parts are in contact they maybe united or welded, whereby the mass or piece formed possessesthroughout the same physical qualities as though the parts had neverbeen separated-that is, the same tensile strength, the same flexibility,the same conductivity for heat or for electricity.

Having thus fully described my invention, what I claim as new, anddesire to secure by Letters Patent, is

The process of welding aluminium, which consists in bringing thethoroughly-cleansed parts of aluminium to be united, into contact, andapplying heat to the same until the metal begins to soften, whereby theymay be welded or permanently united, substantially as described.

In testimony that I claim the foregoing as my invention I have signed myname, in presence of the subscribing witnesses, this 20th day of March,1901.

MARY WISZNIEWSKA EMMI I.

Witnesses:

F. A. STEWART, F. F. TELLER.

